Description:
------------
When foreaching array of arrays referenced, the last index will remain pointer to the second last index afterwards.

Test script:
---------------
<?php
$arrays = [
  [1,3,2],
  [2,8,3],
  [10,8,9],
];
foreach ($arrays as &$array) {
  echo 'First: ' . implode(', ', $array) . PHP_EOL;
}
$arrays[1] = [3,3,3];
foreach ($arrays as $array) {
  echo 'Second: ' . implode(', ', $array) . PHP_EOL;
}



Expected result:
----------------
Last index would act same way the others do.

Actual result:
--------------
Last index is now reference to second last index.